Reboot Wii after playing game from usb drive

When I play a game from USB Loader GX, and I am done playing...I quit the game and go back to the Wii menu and open up the loader again. If I try to play another game, I get only a black screen when trying to load it, with any game.

Now If I reboot the Wii and try a game again, it loads fine. I have to reboot the Wii every time after I play a game, to pay another.

Is this due to a bug that needs to be fixed in cIOS, or in USB Loader GX?